Color tunable Ca₈ZnM(PO₄)₇ (M = Lu/Tb, Lu/Eu, Tb/Eu) phosphors: luminescence, energy transfer and thermal stability studies for n-UV white LEDs

Abstract

A series of Tb3+- and Eu3+-doped Ca8ZnLu(PO4)7 (CZLP:Tb3+ and CZLP:Eu3+) as well as Ca8ZnTb(PO4)7:Eu3+ (CZTP:Eu3+) phosphors have been prepared via the traditional high-temperature solid-state reaction. X-ray powder diffraction (XRD) patterns...

Recent progress in trivalent europium (Eu3+)-based inorganic phosphors for solid-state lighting: an overview

“…Tb 3+ -and Eu 3+ -doped Ca 8 ZnLu(PO 4 ) 7 (CZLP:Tb 3+ and CZLP: Eu 3+ ), as well as Ca 8 ZnTb(PO 4 ) 7 :Eu 3+ (CZTP:Eu 3+ ) phosphors were explored for white LEDs. 199 Zero concentration quenching was observed for both Tb and Eu activation in the Lu site. Tunable emissions were observed (green to red can be realized by adjusting the type of doping ion (Tb 3+ and Eu 3+ ), as well as their mol% in the lattice).…”

Deep-red-emitting phosphors of Mn4+-activated tantalite for high-sensitivity lifetime thermometry and security films

“…[1][2][3][4][5][6][7][8] Generally, common commercial pc-WLEDs are fabricated by applying high-efficiency rareearth (RE)-doped materials (i.e., Y 3 Al 5 O 12 :Ce 3+ , Y 2 O 2 S:Eu 3+ , (Sr, Ca)AlSiN 3 :Eu 2+ , BaMgAl 10 O 17 :Eu 2+ , and (Ba,Sr) 2 SiO 4 :Eu 2+ ) onto near-ultraviolet (NUV) or blue LED chips. [9][10][11][12][13] However, they suffered from high manufacturing cost due to expensive and deficient RE resources, which might be not good enough from an economic perspective. In light of this limitation, there is great demand for exploring good potential candidates with a high performance and a lower price.…”

Revealing Eu3+-doped yttrium pyrogermanate as a soft UV excitable phosphor: retaining the pros of the commercial phosphor and compensating for the cons

“…13 Phosphor-converted white light-emitting diodes (pc-LEDs) are generally being fabricated by combining a blue LED chip with a yellow phosphor or a near-ultraviolet (n-UV) LED chip with a tricolor-emitting phosphor. [14][15][16][17] However, conventional phosphors used in fluorescent lamps/CRTs are not ideal for LEDbased solid-state lighting (SSL) because they have poor absorption for the LED light (near UV or blue). [18][19][20][21][22] Many phosphors used for fluorescent lamps/CRTs are being excited at deep UV wavelengths (Hg 254 nm line) and are not suitable for n-UV LED applications.…”